• Michel Lespinasse's avatar
    mm rmap: remove vma_address check for address inside vma · 86c2ad19
    Michel Lespinasse authored
    In file and anon rmap, we use interval trees to find potentially relevant
    vmas and then call vma_address() to find the virtual address the given
    page might be found at in these vmas.  vma_address() used to include a
    check that the returned address falls within the limits of the vma, but
    this check isn't necessary now that we always use interval trees in rmap:
    the interval tree just doesn't return any vmas which this check would find
    to be irrelevant.  As a result, we can replace the use of -EFAULT error
    code (which then needed to be checked in every call site) with a
    VM_BUG_ON().
    Signed-off-by: default avatarMichel Lespinasse <walken@google.com>
    Cc: Andrea Arcangeli <aarcange@redhat.com>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Daniel Santos <daniel.santos@pobox.com>
    Cc: Hugh Dickins <hughd@google.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    86c2ad19
rmap.c 50.2 KB